Laurel Hope Roth, a former park ranger turned artist, has spent parts of the last decade creating intricate crocheted Biodiversity Reclamation Suits for Urban Pigeons.
Each suit depicts a bird species that is now extinct, perhaps the saddest of which is the urban pigeon's relative, the passenger pigeon:
Her work was displayed at the Smithsonian as part of a cool exhibition called The Singing and the Silence: Birds in Contemporary Art:
• Biodiversity Reclamation Suits for Urban Pigeons (via)